Skill Summary - 2 is one of the three Skill Summaries in Arknights.
- A book that records intermediate tactics. Can be used to upgrade Operator skills.
- It records junior skills needed by Operators. It takes some time and effort to master them.
The second of the Skill Summaries, this book contains detailed information about intermediate combat skills and are need for the intermediate upgrades of Operators' skills.
As seen on the table above, the best operation to farm Skill Summaries - 2 is CA-3.